.

PVC Compounds Testing Instruments

PVC compounds are combined form of the polymer and additives that give the formulation
necessary for the end-user. The convention in recording the additive concentration is based on parts per hundred of the PVC resin (phr). The compound is generated by intimately mixing the ingredients, which is subsequently converted into the gelled article under the influence of heat.  Depending on the type of PVC and additives, the compound before gelation can be a free-flowing powder or a liquid in the form of a paste or solution. PVC compounds can be formulated, using plasticizers, into flexible materials, usually called PVC-P. Compounds without plasticizers for rigid applications are designated PVC-U. PVC is used as the insulation on electrical cables. PVC used for this purpose needs to be plasticized. Flexible PVC coated wire and cable for electrical use stabilised with lead, but these are being replaced with calcium-zinc based systems. Manufacturers test the quality of PVC Compounds using appropriate testing instruments such as PVC Compounds Testing Instruments.

PVC Compounds Testing Instruments